1) Turn the main power switch to the ON position (located on the enclosure
door). Along with the illumination of the GREEN (power status) light, the
display should show the main screen (Image 1).
2) Touch the ON/OFF button (lower left-hand corner of screen). The status
box will change from OFF to ON (Image 2).
3) Via main screen navigate to PARAMETER ADJUST, input values as
applicable.
4) Via Main Screen navigate to STATION STATUS screen and activate the
stations as per connections.
5) Touch the BACKWASH button on The Main Screen. The status box
should show BACKWASHING. Reference the sequence diagram
(DOQ0000139-EN) for the system to confirm valves are working normally.
After the system cycles thru each station the status will return to ON.
MAIN SCREEN
The top of the main screen (Images 1 and 2) will display the status states of the
filter (Table 1). When the timed backwash function is activated it will show a
countdown to the next backwashing cycle in minutes. If the Backwash Interval
time setting is set to zero, this timer will be disabled and the TIMED BACKWASH
DISABLED message will be displayed (Image 6). If a manual or differential
pressure backwash cycle is performed the time interval will reset to the
Backwash Interval time setting. Below is a description of each button function on
the main screen.
A. The ON/OFF power button – See warning box on the first
page. Turns the PLC ON and OFF. In the event of power failure, the
operator will have to turn the system back ON. To reset the system and
clear all error messages, turn the system OFF and back ON.
B. BACKWASH button – Allows the operator to initiate a manual
backwashing sequence. When the button is touched, BACKWASHING will
be displayed in the status box.
C. PARAMETER ADJUST button – Touching this button will display the
parameter adjustment screen. This is where changes can be made to the
backwash sequences (Image 3 for Internal Backwash, Image 4 for
External Backwash).
D. STATION STATUS button – Touching this button will display the station
adjustment screen. This is where stations may be enabled or disabled.
(Image 7).
PARAMETER ADJUSTMENTS
Parameter adjustments can be made by touching the button at the right of the
field you want to change. The numeric keypad (Image 5) will appear and allow
you to enter a new parameter. The range that can be entered will be displayed.
Below is a description of each button function on the Parameter Adjustment
screen (Image 3 for Internal. Image 4 for External).
A. BACKWASH INTERVAL (M) – The Backwash Interval is the amount of
time between automatic backwashing cycles. Backwash sequences will
automatically occur based on this time. Units are in minutes and it is
preset to 240 minutes. Range is 0-1440 minutes. Setting this value to
zero (0) will disable the timed backwash function. (See Image 6).
B. BACKWASH DURATION (S) – The Backwash Duration is the amount of
time each station backwashes during a backwashing sequence. Units are
in seconds and it is preset to 10 seconds. Range is 0-30 seconds.
C. BACKWASH WARNING (S) – Backwash Warning is the delay between
the backwash sequence request and the start of valves actuation. The
backwash in process relay (RL2) is energized to indicate the sequence
will start. Units are in seconds and is preset to 2 seconds. Range is 0-90
seconds.
D. STATION PAUSE (S) – Station Pause is the pause between stations
during the backwashing sequence. Units are in seconds and it is preset to
2 seconds. Range is 0-30 seconds.
E. DP START DELAY (S) – DP Start Delay is the amount of time the signal
from the differential pressure switch must be present prior to initiating a
backwashing sequence. Units are in seconds and is preset to 5 seconds
Range is 0-30 seconds.
F. BACKWASH START DELAY (S)– (EXTERNAL backwashing systems
only) Backwash Start Delay is the amount of time between taking a
station offline and opening the backwash supply valve. This delay allows
the process fluid to drain from the filter body. Units are in seconds and is
preset at 2 seconds. Range is 0-30 seconds.
G. STATION DRAIN (S)– (EXTERNAL backwashing systems only). The
Station Drain duration is the amount of time between closing the
backwash supply valve and placing the station back online. This delay